JPH06245306A - Current collector for trolley wire - Google Patents

Abstract

PURPOSE:To provide a current collector for trolley wire in which production of abrasion powder due to sliding is suppressed while simplifying and downsizing the current collector and to enhance contact stability at the time of current collection. CONSTITUTION:In the current collector for trolley wire, a linear conductive spring member 16 is arched to produce a linear brush 12 having one end (compression terminal 17) secured to a brush holder 11. Most stretched intermediate part is set as a sliding point and the linear brush 12 is coupled, at the free end thereof, with the brush holder through a tension spring 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector for a trolley wire, and more particularly to the provision of such a current collector useful for collecting current in an insulated trolley wire.

[0002]

2. Description of the Related Art A solid brush made of a sintered copper alloy has been generally used for collecting trolley wires, particularly insulated trolley wires.

FIG. 2 shows a typical example of a current collector for an insulated trolley wire, in which a brush 1 made of a solid sintered alloy is provided with a clevis 2 as a holder integrally molded with the brush 1.
It is elastically held by being attached to the shaft via the compression spring 3. The clevis 2 is pivotally supported by inserting its own rod-shaped portion into a cylindrical clevis receiver 4, and the clevis receiver 4 is connected to a parallel link type arm 5 at one end side by a rivet or the like. A cylindrical bearing 6 is connected to the opposite end of the arm 5, and the arm 5 is biased at its tip end side toward the trolley wire by extending a tension spring 7 obliquely between its parallel arm portions. As a result, the solid brush 1 is pressed against the conductor of the trolley wire based on the tilting force due to the spring bias of the arm 5 and can slide with a predetermined pressing pressure. 9 is the base,
A shaft 8 that supports the bearing 7 is implanted. By pulling the base 9 on a mobile device. It is designed to be used for mobile power collection.

[0004]

In the above-mentioned conventional current collector, since the solid brush made of sintered copper alloy is used, the long arm for supporting and the spring for urging the arm toward the trolley wire side. However, the mechanism is complicated and the weight tends to increase. Further, if the conductor surface of the trolley wire is slid and repeated with the above-mentioned sintered copper alloy brush, a large amount of abrasion powder is generated, and it is necessary to perform regular cleaning.

Further, when the solid brush as described above is used for signal transmission, a so-called tandem type in which a pair of arms are assembled and the brushes are held by the respective arms is provided so as to compensate for the wire separation problem of both brushes. I was doing. The current collector of such a type obviously causes an increase in size and is difficult to be used in a field where the space is more and more restricted, and it is necessary to fundamentally review the entire device.

Since the present invention is a departure from the above-mentioned state of the art, the current collector for this type of trolley wire is capable of simplifying and downsizing the device and suppressing the generation of abrasion powder due to sliding during current collection. The main purpose is to provide a device. Further, it is an additional object to improve contact stability during sliding current collection in such a current collector.

[0007]

The means of the present invention for achieving the main purpose and the additional purpose is a linear brush obtained by forming a wire material made of a conductive spring material into an arc shape. By fixing the fixed end set at one end to the brush holder, it is projected in an arc shape, and the most protruding bow-shaped part in the middle is set as the sliding point, and the free end side of the tip from the sliding point is set. It is linked to the brush holder via a tension spring.

[0008]

1 shows an embodiment of a trolley wire current collector according to the present invention, in which 11 is a brush holder and 1 is a brush holder.
2 is a linear brush.

Therefore, the brush holder 11 is obtained by molding engineering plastic, and one positioning projection 14 is formed on the mounting surface for the base plate 13, and the positioning projection 14 is fitted on the base plate 13. A round hole is formed. Further, in the brush holder 11, one bolt through hole is formed at a position apart from the protrusion 14, and a bolt 15 is arranged so as to penetrate therethrough. When the base plate 13 and the brush holder 11 are fastened with the bolts 15, the positioning projections 14 are fitted into the holes of the base plate for positioning and fixing.

The linear brush 12 is made of beryllium copper (C17).
20), spring phosphor bronze (C5210), spring nickel silver (C7)
701) and the like, which are electrically conductive and have spring characteristics
Is formed into a proper cross-section, for example, a round shape, and is preformed into an arch shape as shown in the drawing, and one or a plurality of the pieces are bundled. Then, the crimp terminal 17 is crimped and fixed on one end side of the linear brush 12, and the ring 18 for preventing the scattering is attached on the other end side.

The brush holder 11 is provided with an inclined mounting surface 19 into which an insert fitting is embedded and a screw 20 can be screwed. The crimp terminal 17, which is the fixed end of the linear brush 12, and the crimp terminal 22 of the lead wire 21 overlap each other and are fastened to each other with the screw 20 to support the cantilever beam of the linear brush 12 and the lead wire. The connections are fulfilled at the same time. The linear brush 12 so mounted has a middle and high bow-shaped portion 12
a is projected most, and that portion is used as a sliding point for the sliding surface (see the chain double-dashed line) of the trolley wire conductor.

The linear brush 12 mounted as described above has a hook 23 at a position closer to the free end side (ring 18 side) at the tip than the sliding point 12a.
Is attached, and a tension spring 25 is stretched between the hooking tool 23 and a hooking portion 24 provided on the brush holder 11, so that the tension spring 25 is provided on the free end side.
It is always applied by the pulling force of.

The current collector of this embodiment is used for a two-wire insulated trolley wire, and two linear brushes 12 are attached in parallel as shown in the figure. At the crimp terminal fixing portion, a jetty 26 is provided so as to prevent both crimp terminals from rotating and coming into contact with each other. The tension spring 25 is hooked on the free end of each linear brush. Therefore, a hook is attached at each free end.

[0014]

According to the trolley wire current collector of the present invention as described above, the wire itself made of a conductive spring material also serves as an arm and provides an elastic pressing force against the trolley wire. The entire device can be simplified and the size can be further reduced. Also, by using the arc-shaped part of the wire itself as the sliding point, wear resistance based on the spring material of the wire is utilized to generate wear powder during sliding. It is possible to obtain the overall effect that the above can be sufficiently suppressed.

Further, since the free end of the bow-shaped linear brush is linked to the brush holder by the tension spring, the linear brush is restrained from moving delusionally during the sliding process, As a result, the pressing force against the trolley wire at the bow-shaped portion of the linear brush can be made constant, and the contact sliding can be stabilized.

[Brief description of drawings]

FIG. 1 shows an embodiment of a current collector for a trolley wire according to the present invention, in which (a) is a plan view and (b) is a front view.

FIG. 2 is a front view showing an example of a conventional trolley wire current collector.

[Explanation of symbols]

 11 Brush Holder 12 Wire Brush 16 Wire Material 17 Crimp Terminal 23, 24 Hook 25 Tension Spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Tanoi 5-1-1 Hidaka-cho, Hitachi-shi, Ibaraki Hitachi Cable Co., Ltd. Hidaka factory

Claims (2)

[Claims] 1. A linear brush obtained by molding a wire rod made of a conductive spring material into an arc shape is projected in an arc shape by fixing a fixed end, which is set at one end, to a brush holder. The trolley wire current collector is characterized in that the most protruding bow-shaped portion is set as the sliding point, and the free end side of the tip beyond the sliding point is linked to the brush holder via a tension spring. 2. The current collector for a trolley wire according to claim 1, wherein a plurality of linear brushes are juxtaposed in parallel, and each linear brush is independently linked to a brush holder by a tension spring on a free end side.